A first device is provided. The first device comprises an integrated OLED structure disposed over a single substrate. The integrated OLED structure includes a blue-emitting OLED, a green emitting OLED, and a red emitting OLED. The blue emitting OLED has a first active area defined by a first electrode of the blue emitting OLED disposed in a first plane. The green emitting OLED has a second active area. The red emitting OLED has a third active area. The second and third active areas are disposed in a second plane different from and parallel to the first plane. Each of the second and third active areas are at least partially superposed with the first active area.